CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Geothermal mapping, Europe. Map of Europe, showing the temperature at a depth of five kilometres below the surface. This shows areas with a high potential for boreholes to be drilled to those depths, to extract geothermal power. The colour-coded key shows temperatures in degrees Celsius: 60-80 (green), 100-120 (yellow), 160-180 (orange), 200-240 (red) and 280 (brown).
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